I found a 86 300SDL for cheap that my uncle is interested in.. the owner says he had the head rebuilt, new timing chain, water pump, injection pump re-timed by Bosch, and a new radiator recently.. looks good, starts good, odometer says 185K but the steering wheel and seats say differently I think.. or someone just had really rough hands to make that steering wheel as smooth as glass.

The problem is, the damn thing cant even get out of its own way. Its as slow as a non turbo 123 300D.. Im not even sure if I hear the turbo spooling.

I think I can get it for a song and a dance, but I want to make sure this isnt any idications of -serious- mechanical problems. It sounds good, shifts good, but just slower than hell.

Any advise?